제출 #999130

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
999130		crafticat	Newspapers (CEOI21_newspapers)	C++17	4 / 100	1 ms	348 KiB

newspapers

#include <bits/stdc++.h>

using namespace std;

int main() {
    ios_base::sync_with_stdio(false); cin.tie(nullptr);

    int n, m; cin >> n >> m;

    vector<vector<int>> g(n + 1);
    for (int i = 0; i < m; ++i) {
        int a, b; cin >> a >> b;
        g[a].push_back(b);
        g[b].push_back(a);
    }
    bool binary = true;
    int spec = 1;
    for (int i = 1; i <= n; ++i) {
        for (auto child : g[i]) {
            if (g[child].size() > 2 && g[i].size() > 2) binary = false;
        }
    }
    if (spec > 2) binary = false;

    if (m != n - 1 || !binary) {
        cout << "NO\n";
    } else {
        cout << "YES\n";
        cout << "1\n";
        cout << "1\n";
    }

    return 0;
}

• Subtask 1: 0 / 12
• Subtask 2: 4 / 8
• Subtask 3: 0 / 80